[Cl:1][C:2]1[N:7]2[N:8]=[CH:9][N:10]=[C:6]2[N:5]=[C:4]([CH3:11])[C:3]=1[CH2:12][CH:13](Cl)[CH3:14].[C:16]([NH2:20])([CH3:19])([CH3:18])[CH3:17].C(=O)([O-])[O-].[Na+].[Na+].Cl.C(O)C>C(O)C>[ClH:1].[C:16]([N:20]1[C:2]2[N:7]3[N:8]=[CH:9][N:10]=[C:6]3[N:5]=[C:4]([CH3:11])[C:3]=2[CH2:12][CH:13]1[CH3:14])([CH3:19])([CH3:18])[CH3:17]A mixture of 2.4g of 7-chloro-6-(2-chloropropyl)-5-methyl-s-triazolo[1,5-a]pyrimidine, 0.9g of tert-butylamine, 1.8g of sodium carbonate and 20 ml of ethanol was stirred for 3 hours at room temperature and then refluxed for 5 hours. The hot reaction mixture was filtered, the filtrate was concentrated under reduced pressure and the residue was purified by a column chromatography of alumina. To an oily substance thus obtained was added a solution of hydrogen chloride-ethanol and the crystals precipitated thereby were collected by filtration.
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